JP2013193753A - Tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make thinner a thickness of a tank into which a high speed and high pressure liquid is injected.SOLUTION: A fluid W is jetted in a tank 110 including a pipe pedestal 114 on a tank body 115 from the pipe pedestal 114. In the tank body 115, a guide 131 is arranged, and the guide face 131a of the guide 131 faces obliquely to the opening face of the pipe pedestal 114. The advancing direction of the fluid W jetted from the pipe pedestal 114 is changed by a guide 131 to the bottom face of the tank 110, and the fluid collides with a buffering fluid Wo, and then, as it collides obliquely with the bottom face of the tank, the collision force is reduced. Therefore, the plate thickness of the tank body can be made thinner, and the manufacturing cost of the tank 110 can be reduced.

Description

  The present invention relates to a tank that receives a large impact force because high-speed and high-pressure liquid (fluid) is injected, and is devised so that the thickness of the tank can be reduced to reduce the cost.

When developing a nuclear reactor, various tests are performed on each component of the nuclear reactor. Among the tests, there is a test in which high-speed, high-pressure water is allowed to flow through the specimen (the component device being tested) to check whether the specimen has the desired characteristics.
The water that has passed through the specimen is poured into the tank and stored in the tank.

FIG. 3 shows a tank 10 into which water that has passed through the specimen as described above is injected. The tank 10 is configured by closing one end side of a cylindrical drum portion 11 with an end plate 12, closing the other end side of the drum portion 11 with an end plate 13, and attaching a nozzle 14 to the end plate 12.
In this example, a tank body 15 is formed by the drum portion 11 and the end plates 12 and 13.

As for the dimensions of the tank 10 (tank body 15), the lateral dimension (dimension between both end plates) is about 10 m, and the diameter (diameter of the drum portion) is about 4 m.
A pipe 20 for injecting water W into the tank 10 is connected to the nozzle 14.

The high-speed and high-pressure water W circulates in the pipe 20 and is ejected through the nozzle 14 into the tank 10 (tank body 15). In this case, the pressure of water is, for example, 60 atm at maximum, and the flow rate is, for example, 20 m / sec at maximum.
The water W ejected from the nozzle 14 into the tank 10 travels while the diameter of the water expands and collides with the inner wall of the end plate 13 and the inner wall of the drum 11. In particular, a large impact force acts on the end plate 13 located on the opposite side of the nozzle 14 because the sprayed water W directly hits it.
The water W colliding with the end plate 13 and the inner wall of the drum 11 then flows downward due to gravity and accumulates at the bottom of the tank 10.

JP-A-8-310482

In the conventional tank 10, the high-speed and high-pressure water W collides with the inner wall of the tank 10 with a large impact force, and the tank 10 itself is a high-pressure gas facility. The plate | board thickness of the tank 10 (tank main body 15) was thick.
Thus, since the plate | board thickness of the steel material (plate material) which comprises the tank 10 (tank main body 15) is thick, it was expensive to manufacture the tank 10. FIG.

  An object of the present invention is to provide a tank capable of reducing the thickness by reducing the plate thickness in view of the above-described conventional technology.

The configuration of the present invention for solving the above problems is as follows.
The tank body,
In the tank provided with a nozzle that is attached to the tank body and ejects the liquid that has circulated through the pipe into the tank body.
The surface on which the liquid ejected from the nozzle collides is disposed in the tank body in a state where it is inclined with respect to the traveling direction of the liquid, and the traveling direction of the liquid colliding with the surface is A guide is provided so as to face the bottom surface of the tank body.

The configuration of the present invention is as follows.
The tank main body is composed of a cylindrical drum portion and an end plate that closes both end faces of the drum portion,
The nozzle is attached to one of the end plates,
The guide is disposed opposite to the nozzle so as to bend the traveling direction of the liquid ejected from the nozzle and guide the liquid to the bottom surface of the tank body. It is characterized by.

The configuration of the present invention is as follows.
The guide has a plate shape or a cylindrical shape.

The configuration of the present invention is as follows.
The tank body is preliminarily filled with a buffering liquid before the liquid flowing through the pipe is ejected from the nozzle into the tank body.

  According to the present invention, since the traveling direction of the liquid sprayed from the nozzle into the tank body is bent toward the tank bottom surface by the obliquely arranged guide, the impact force of the liquid on the tank body can be reduced. it can. As a result, the thickness of the tank can be reduced, and the manufacturing cost can be reduced.

It is a block diagram which shows the tank which concerns on Example 1 of this invention. It is a block diagram which shows the tank which concerns on Example 2 of this invention. It is a block diagram which shows the tank of a prior art.

  Hereinafter, the tank concerning the present invention is explained in detail based on an example.

FIG. 1 shows a tank 110 according to Embodiment 1 of the present invention. In the tank 110, one end side of the cylindrical drum portion 111 is closed with an end plate (end plate) 112, and the other end side of the drum portion 111 is closed with an end plate (end plate) 113. The nozzle 114 is attached to the nozzle.
In addition, a portion including the drum portion 111 and the end plates 112 and 113 is defined as a tank body 115. In the present embodiment, the tank 110 is installed with the axis of the drum portion 111 being horizontal.

In this example, the nozzle 114 is attached to the end plate 112 in a state where the axis is horizontal. A pipe 120 for injecting a fluid W such as water into the tank 110 is connected to the nozzle 114.
The high-speed and high-pressure fluid W flows through the pipe 120 and is jetted into the tank 110 (tank body 115) through the nozzle 114. In this case, the pressure of the fluid W is, for example, 60 atm at the maximum, and the flow velocity of the fluid W is, for example, 20 m / sec at the maximum.

  An attachment piece 130 is connected to the inner wall of the tank 110, for example, the inner wall of the drum portion 111, by welding or the like, and a plate-like guide 131 is attached to the attachment piece 130 with a mechanical fastening member such as a bolt. It has been.

  The guide 131 is disposed in the tank 110 (tank main body 115) at a position downstream of the nozzle 114 with respect to the traveling direction of the fluid W and inclined with respect to the horizontal plane. It is diagonally opposed to (opening surface on the tank side).

  The guide 131 is disposed obliquely with the upstream portion positioned upward and the downstream portion positioned downward with respect to the traveling direction of the fluid W, and the guide surface 131a faces the opening surface of the nozzle 114 obliquely. ing. Due to such an arrangement, the guide 131 bends in the traveling direction of the fluid W that is ejected almost horizontally from the nozzle 114 into the tank 10 and collides with the guide surface 131 a, so that the fluid W is supplied to the tank 110. It can be guided to the bottom side.

  In order to inject the fluid W into the tank 110, a fluid Wo such as buffering water is put in the tank 110 and stretched on the bottom surface of the tank 110 in advance.

Thereafter, a fluid W having a high speed and a high pressure (for example, a maximum pressure of 60 atm and a maximum flow rate of 20 m / sec) is circulated through the pipe 120 and ejected into the tank 110 through the nozzle 114.
The fluid W ejected from the nozzle 114 into the tank 110 advances while its water diameter increases,
It collides with the guide surface 131a of the guide 131 arranged obliquely. Then, the traveling direction of the fluid W is bent, and the fluid W moves toward the bottom surface side of the tank 110.
The fluid W whose traveling direction has been changed obliquely downward first collides with the fluid Wo previously stretched on the bottom surface of the tank 110 to reduce the impact force, and thereafter, the bottom surface of the tank 110 (the lower part of the drum portion 111). It collides diagonally with the inner wall.

  As described above, the impact force of the fluid W is absorbed by the fluid Wo. Further, as a result of the fluid W colliding obliquely with the bottom surface of the tank 110, the impact force acting on the tank 110 by the fluid W is compared with the conventional one. , Greatly ease.

Therefore, the plate | board thickness of the steel material (plate | board material) which comprises the drum part 111 of the tank 110 and the end plate 112,113 can be made thin, for example, plate | board thickness can be 50 mm.
Since the plate | board thickness of the tank 110 can be made thin, the cost which manufactures the tank 110 can be reduced.

  Further, the guide 131 is disposed obliquely, and the ejected fluid W only collides with the guide 131 obliquely to change the traveling direction, so that the impact force exerted on the guide 131 by the fluid W is small.

  Although not shown, the tank 110 includes a pressure adjustment valve. When the fluid W is injected into the tank 110 and the pressure of the gas (air) in the tank 110 becomes higher than a predetermined pressure, the pressure adjustment valve is opened, and the gas whose pressure has increased. (Air) is discharged out of the tank.

  Next, a tank 110A according to a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in the guide portion, but the other portions are the same as those in the first embodiment shown in FIG. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

A mounting piece 130 is connected by welding or the like to the inner wall of the tank 110A, for example, the inner wall of the drum portion 111, and a cylindrical guide 132 is attached to the mounting piece 130 by a mechanical fastening member such as a bolt. It has been.
The nozzle 114 is attached to the end plate 112 in a state where the axis is horizontal.

  The guide 132 is disposed in the tank 110A (tank body 115) in a state of being inclined with respect to the horizontal plane at a position downstream of the nozzle 114 with respect to the traveling direction of the fluid W such as water. The upper opening surface 132a is diagonally opposed to the opening surface of the nozzle 114 (the tank-side opening surface). Further, the lower opening surface 132 b of the guide 132 is opposed obliquely to the bottom surface of the drum portion 111.

  The guide 132 is disposed obliquely with the upstream portion positioned upward and the downstream portion positioned downward in the traveling direction of the fluid W. The guide 132 guides the fluid W ejected almost horizontally into the tank 10 from the nozzle 114 into the cylindrical internal space and then bends the traveling direction to guide the fluid to the bottom surface side of the tank 110A. As a result, the inner peripheral surface of the guide 132 functions as the guide surface 132c.

  In the tank 110A of the present embodiment, when the diameter (inner peripheral side diameter) of the nozzle 114 is d1, the diameter (inner peripheral side diameter) d2 of the guide 132 is twice as large as d1.

  The fluid W ejected from the nozzle 114 into the guide 132 flows along the surface of the upper surface side portion of the inner peripheral surface of the guide 132. In addition, since the diameter (inner peripheral side) d2 of the guide 132 is twice the diameter (inner peripheral side) d1 of the nozzle 114, the lower surface portion of the inner peripheral surface of the guide 132 is Since the gas (air) in the tank 110A enters from the upper opening surface 132a and the lower opening surface 132b of the guide 132, the pressure fluctuation of the fluid W in the guide 132 is reduced.

  Since the pressure fluctuation of the fluid W in the guide 132 is small, the angle of the fluid W can be changed smoothly when the angle is changed from the point P to the base point, and the length d3 described later can be shortened.

  Further, in the tank 110A of the present embodiment, when the line where the central axis of the horizontally arranged nozzle 114 intersects the inner peripheral surface of the guide 132 is a point P, the downstream opening surface 132b from the point P of the guide 132. The length d3 is set to four times the diameter (inner peripheral side diameter) d1 of the nozzle 114.

  The fluid W ejected from the nozzle 114 into the guide 132 is bent in the direction of travel from the horizontal direction to the downward direction with the flow point P as a base point in the guide 132. At this time, in order to smoothly change the traveling direction of the fluid W, it is considered that the length d3 needs to be about three times as long as the length d1, and d3 = 4 × d1 in the present embodiment. did.

  Further, in the tank 110 </ b> A of the present embodiment, a gap 140 is provided between the upper opening surface 132 a of the guide 132 and the end plate 112. The distance L of the gap 140 is set so that the area (L × π · d2) of the gap 140 is five times the opening area (π / 4 · d1 · d1) of the nozzle 114.

  By providing a gap 140 between the upper opening surface 132a of the guide 132 and the end plate 112, the gas (air) in the tank 110A is supplied to the portion where the pressure has dropped due to the fluid W being ejected from the nozzle 114. It is considered that the gas supply is not hindered if the area (L × π · d2) of the gap 140 is about four times the opening area (π / 4 · d1 · d1) of the nozzle 114. To make room, it is 5 times.

  In order to inject the fluid W into the tank 110A, a fluid Wo such as buffering water is put in the tank 110A in advance and stretched on the bottom surface of the tank 110A.

Thereafter, a fluid W having a high speed and a high pressure (for example, the maximum pressure is 60 atm and the maximum flow rate is 20 m / second) is circulated through the pipe 120 and ejected through the nozzle 114 into the tank 110A.
The fluid W ejected from the nozzle 114 into the tank 110A proceeds from the upper opening surface 132a into the guide 132, and collides with the inner surface (guide surface 132c) of the guide 132 disposed obliquely. If it does so, the advancing direction of the fluid W will be bent and the fluid W will go to the bottom face side of the tank 110A.
The fluid W whose traveling direction has been changed obliquely downward first collides with the fluid Wo previously stretched on the bottom surface of the tank 110A to reduce the impact force, and then the bottom surface of the tank 110A (the lower part of the drum portion 111). It collides diagonally with the inner wall.

  Thus, the impact force of the fluid W is absorbed by the fluid Wo, and the impact force acting on the tank 110A by the fluid W as a result of the fluid W colliding obliquely with the bottom surface of the tank 110A is compared with the conventional one. , Greatly ease.

Therefore, the plate | board thickness of the steel material (plate | board material) which comprises the drum part 111 of the tank 110A, the end plate 112, 113 can be made thin, for example, plate | board thickness can be 50 mm.
Since the thickness of the tank 110A can be reduced, the cost for manufacturing the tank 110 can be reduced.

  Further, the guide 132 is disposed obliquely, and the ejected fluid W only collides obliquely with the guide 132 and changes its traveling direction. Therefore, the impact force exerted on the guide 132 by the fluid W is small.

In the embodiment shown in FIG. 2, the cylindrical guide 132 is used. However, a half-pipe shape (a cylindrical shape in which the cylindrical material is divided in half along the axial direction) without the lower portion of the cylindrical guide 132 is used. A guide can also be employed.
In addition, a guide whose cross-sectional shape is a shape obtained by rotating a U-shape 90 ° to the left can be used.

The tank 110, 110A is not limited to water but may be other liquid (fluid).
Further, the tank body is not limited to a shape in which both end surfaces of the drum portion are closed by end plates, but may be a spherical shape or other three-dimensional shape.

10, 110 Tank 11, 111 Drum part 12, 13, 112, 113 End plate 14, 114 Tube base 15, 115 Tank body 20, 120 Pipe 130 Mounting piece 131, 132 Guide 131a, 132c Guide surface 140 Clearance W, Wo Fluid ( water)

Claims (4)

The tank body,
In the tank provided with a nozzle that is attached to the tank body and ejects the liquid that has circulated through the pipe into the tank body.
The surface on which the liquid ejected from the nozzle collides is disposed in the tank body in a state where it is inclined with respect to the traveling direction of the liquid, and the traveling direction of the liquid colliding with the surface is A tank comprising a guide disposed in a state of being directed to the bottom surface of the tank body. The tank main body is composed of a cylindrical drum portion and an end plate that closes both end faces of the drum portion,
The nozzle is attached to one of the end plates,
The guide is disposed opposite to the nozzle so as to bend the traveling direction of the liquid ejected from the nozzle and guide the liquid to the bottom surface of the tank body. The tank according to claim 1.   The tank according to claim 1 or 2, wherein the guide has a plate shape or a cylindrical shape.   The buffer liquid is put in the tank main body before the liquid flowing through the pipe is ejected from the nozzle into the tank main body. The tank according to any one of claims 1 to 3.

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